The Russian Variation, Yugoslav Variation is a variation of the Grünfeld Defense, catalogued as ECO D99. The line runs 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5, reaching the position shown below after 18 half-moves.
White holds the centre with pawns on d4 and e4, and one pawn capture is available, so the structure has not settled yet. Development is level at three minor pieces each. It is White to move after nine moves. Black has castled while White’s king is still uncommitted.
On the Grünfeld Defense generally: A hypermodern defense where Black allows White a big center then undermines it with ...d5.
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The Russian Variation, Yugoslav Variation goes 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5. It is a variation of the Grünfeld Defense and is catalogued as ECO D99.
The Russian Variation, Yugoslav Variation is ECO D99. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Grünfeld Defense.
Stockfish evaluates the position after 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5 at +0.50 at depth 18, which is a slight pull for White, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on d4 and e4, and one pawn capture is available, so the structure has not settled yet. Development is level at three minor pieces each. It is White to move. Black has castled while White’s king is still uncommitted.